When I downloaded the pack, the base tileset doesn't include chara1 or vampire sets. Is there any way to get them at the smaller size? Actually, I noticed the doors and lava aren't included at each size either.

Here's a 100% version of the vampire chars I quickly put together for you: Vamps

As for the char1 set; those characters are exclusive for use in RPGMaker and weren't included in the "general license" version of the pack. If you're missing those sets and you're using RPGMaker, send me an email and I can give them to you.